Do you like the away goals tiebreaker though? To me I just think it's a definite advantage.
Lets say the game next weekend ends 2-1 Red Bulls, with Columbus scoring on a PK. Do you think if the overall score after 180 minutes is 2-2, Columbus is more deserving of advancing because it was 'harder' for them to score that PK goal on the road? That doesn't make any sense. Never has, never will in my view.
Make it single game elimination at the highest seed.
I've always hated away goals (it's not the 60s anymore), but still don't understand why you and others keep claiming playing at home in the first leg is such a huge advantage. Yes, it sure seems to work against us but if "bunker at home, win 1-0 and score an away goal" is such a brilliant strategy, the order of the games should not really matter. And this brilliant strategy never seems to work for us as we are often toothless away from home (in recent years, Crew, Montreal, Toronto (one Royer fluke goal not enough), Crew again; 4-0 win vs Chicago a notable outlier), but that's hardly the fault of the format. Definitely more about performance/execution and not format.